Blowing device for drill steels



'May E924 L. C. EAYLES- BLowING DEVICE FOR DRILL STEELS med may 25 PNVENTOR Patented May i3, i924.

TES

PATENT OFFICE.

LEWIS C. BAYLES, 0F EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COM- PANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BLOWING DEVICE FOR DRILL STEELS.

Application sled may 25,

To all whom t may concern.'

Be it known that I, Lnwrs C. BAYLns, a citizen of the United States, and a resident of Easton, in the county of Northampton and State of Pennsylvania, have invented a certain new and useful Blowing Device for Drill Steels, of which the following is a specification accompanied by drawings.

This invention relates to blowing devices for rock drill steels and more particularly to a device for effecting fluid tight relationship between a hollow rock drill steel and a blowing nozzle. The nozzle is connected to a source of fluid supply, so that live fluid pressure may be directed through the bore of a hollow drill steel, for cleansing a hole in which the drill steel may be located or otherwise.

In drilling with rock drills the drill steel at times becomes stuck or wedged in the hole, and it becomes necessary to clean out the hole as well as the axial passage through the drill steel. A blowing device, such as a nozzle, is usually appliedv to the end of the steel to direct live fluid pressure through the steel for cleaning purposes. Clamping means have been employed to grasp the collar with which some drill steels are provided and force the steel in fluid tight relationship with the nozzle to enable the live fluid pressure to be directed through the` steel without leakage. When the drill steel is of the collarless variety however, it has been found difficult, if not impossible, to secure the necessary fluid tight engagement between the nozzle and steel. t

The primary object of the present invention is to enable a hollow drill steel to be held in fluid tight relationship with a live fluid pressure supply nozzle. A further object is to enable afdevice of this character to be equally applicable to hollow drill steels of either the collared or collarless variety, without change of parts. A still lfurtherl object is to obtain fluid tight clamped` relationship between the hollow drill steel and nozzle by means of a simple and positively acting device which may be attached `to an air supply hose line or any other desired source of fluid pressure.

The above objects and others which will become evident hereafter are carried out in a preferred embodiment of the present invention described in the following specifica- 1922. Serial No. 563,581.

tion and illustrated in the accompanying drawings forming a part hereof in which- Figure 1 is a longitudinal elevation partly in vertical section of ay hollow drill steel with the invention applied thereto;

F igureQ is a side elevation of the nozzle and gripping means; and

Figure 3 is a transverse sectionon the line 3 3 of Figure l, looking in the direction of the arrows.

In the drawings, a hollow hexagonal rock drill steel A having a smooth shank is shown in position within a drilled hole B. A cylindrical nozzle C having a nipple D at one end, and a central longitudinal bore E adaptedto be aligned with the axial bore F of the hollow drill steel A, is disposed above the steel A. A gasket or packing Gr of suitable material isfitted in a central cylindrical chamber or recess H at the opposite end of the nozzle C, so that it surrounds the bore E. The packing material G preferably extends somewhat beyond the recess H, and may be in the form of a gasket having a central aperture J conforming to the bores E and F.

A hose line or pipe K is secured `on the nipple end D'of the nozzle C by means of a clamp L of any approved form. The hose or pipe K leads from a source of live air supply (not shown), and a throttle valve O is placed in the hose line at any desired point, preferably at a distance from the nozzle which will be safe enough to prevent annoyance to the operator when the dbris and slime are blown out of the hole.

Stripping means are associated with the nozzle C for holding the drill steel A in fluid tight relationship with the nozzle to prevent any leakage or wastage of air during the blowing operation. The gripping means include a plurality of angular yoke shaped jawmembers P and Q which cross each other and surround thesteel A. The jaw member Q, is inside of the jaw member P and the ends R and S of the jaw members are pivoted to longitudinally movable links T as shown at 'a by meansof pins or bolts Z,

and the ends lof the `links T are secured between the ends of the jaw members. The jaw members P and Qv are pivoted to each other ata point approximately centrally of their length as shown at thusforming a pair of toggle levers. Angular jaws V and W are formed at the bends of the yoke shaped members P and Q respectively, and these jaws are adapted to engage and securely grasp opposite fiat sides X and Y of the hexagonal drill steel A. The aws V and W may however, be curved or in any other desired shape to fit `round or other shaped drill steel.

An internally threaded nut b having a plurality of wings or linger pieces c, in the present instance four is mounted on the threaded exterior portion al of the nozzle C. The nut o is provided with an annular recess e near its lower end, and an annular ring f, made up of two segmental sections g and 7L fits this recess e. The ring f is adapted to remain stationary or nonmovable longitudinally relatively to the nut o and forms a connection between the nut b and the links T, and also constitutes one preferred device by means of which the gripping jaw members are mounted on the longitudinally mov able wing nut b.

The nut b slides freely within the ring f, but to restrain the links T and other parts of the gripping mechanism against rotative movement, which might damage the parts or render the gripping means ineffective, the nozzle C is provided at its lower end with oppositely disposed lugs or ears e' and j which form stops for the links T. The up` per ends of the links T are pivotally secured between the adjacent outwardly turned ends 7c and o of the ring sections g and h, respectively, by means of bolts p. The nut b which is longitudinally movable on the nozzle is thus adapted to actuate the jaws V and W to securely hold the steel and nozzle in fluid tight relationship.

In the operation of the device the nozzle C is placed over the steel A, with the bore E in alignment with the bore F of the drill steel, and the jaw members V and W embracing but not necessarily touching opposite sides or faces of the steel. The nut b is then turned upward by means of the wings or finger pieces o, causing the links T to act on the upper portions of the jaw members P and Q. The jaw members turn on the pivot point U and force the lower portions or jaws V and W tightly against the sides of the steel. The upward screwing of the nut b also serves to bring the nozzle C into closer relationship with the end 0f the steel A, and the resilient packing G is forced tightly into the interstices between the1 nozzle and steel and forms an air tight sea Dotted lines in Figure 1 indicate the position of the yoke members P and Q when the nut b is screwed down. Sufficient clearance is allowed between the jaw members V and W and the steel \A so that the blowing device may be readily positioned above the steel. v

The longitudinal movement of the nut b simultaneously actuates the jaws V and W to securely grasp the steel and effects fluid tight relationship between the nozzle and steel. The steel therefore may be blown out with full pressure turned on at the throttle O without any leakage or waste of air.

I claim:

1. A blowing device for hollow drill steels having a smooth shank end comprising a nozzle having a fluid passage adapted to be aligned with the bore of a hollow drill steel, pivoted jaws for gripping the smooth shank end of the steel and holding the steel in fluid tight relationship with the nozzle, and means on said nozzle for actuating 'said gripping jaws adapted to effect fluid-tight relationship between the nozzle and the steel when moved outwardly on the nozzle.

2. A blowing device for hollow drill steels having va smooth shank end comprising a nozzle having a fiuid passage adapted to be aligned with the axial bore of a hollow drill steel, pivoted gripping jaws on said nozzle adapted to securely grasp the sides of the drill steel and hold the steel in fluid tight relationship with the nozzle, and longitudinally movable means on said nozzle for actuating saidl gripping means, whereby the drill steel is tightly gripped when said longitu dinally movable means is moved outwardly on the nozzle.

3. A blowing device for hollow drill steels having a smooth shank end comprising a nozzle having a iiuid passage adapted to be aligned with the axial bore 0f a drill steel, gripping means associated with said nozzle having pivoted jaws adapted to securely grasp sides of the steel and longitudinally movable means on said nozzle for actuating said gripping means to hold the steel in fluid tight relationship with the nozzle, said gripping means being mounted on said longitudinally movable means, whereby the drill steel is tightly gripped when said screw threaded means is moved outwardly on the nozzle.

4. A blowing device for hollow drill steels having a smooth shank end comprising a nozzle having a fluid passage adapted to be aligned with the axial bore o f a hollow drill steel, gripping means associated with said nozzle having pivoted jaws adapted to securely grasp sides of the drill steel, resilient packing around the fluid passage between said nozzle and steel, and screw threaded means on said nozzle for actuating said gripping means to hold the steel and nozzle in Huid tight relationship, whereby the drill steel is tightly gripped when said screw threaded means is moved outwardly on the nozzle.

5. A blowing device A for hollow drill steels having a smooth shank end comprising a. nozzle having a fluid passage adapted llO and steel in fluid tight relationship, said gripping means including pivote'd jaws adapted to grasp opposite sides of the steel, and longitudinally movable screw threaded means on said nozzle adapted to actuate said jaws to securely hold the steel and nozzle in fluid tight relationship when moved outwardly on the nozzle.

6. A blowing device for hollow drill steels comprising an eXteriorly threaded nozzle having a fluid passage adapted to be i aligned with the axial bore of a hollow drill steel, a pair of toggle levers having jaws engaging opposite sides of the steel, longitudinally movable links pivoted to said toggle levers, a nut threaded on said nozzle and a relatively non-movable connection between said links and said nut, whereby the turning of said nut will simultaneously cause the links to act on the toggle levers, forcing the jaws against the steel and effect fluid tight relationship Ibetween the nozzle and steel.

7. A blowing device for hollow drill steels having a smooth shank end comprising a nozzle having a fiuid passage adapted to be aligned with the axial bore of a hollow drill steel, gripping means associated with said nozzle having a pair of pivoted gripping jaws adapted to securely grasp opposite sides of the drill steel, resilient packing around the fluid passage between said'nozzle and steel, and longitudinally movable screw threaded means on said nozzle adapted to simultaneously actuate said jaws to securely grasp the steel and effect fluid tight relationship between the nozzle and steel.

8. A blowing device for hollow drill steels having a smooth shank end `and adapted to be aligned with the hollow steel, comprising a nozzle for conveying pressure fluid to said steel, gripping means adapted to grip the smooth end of the steel, and means carried by the nozzle for actuating the gripping means to draw and hold the shank in fluid tight relationship against said nozzle.

9. A blowing device for hollow drill steels having a smooth shank end, comprising a nozzle for conveying pressure fluid to the steel, pivoted gripping members adapted to grip the opposite sides of the smooth shank end of the steel, and actuating means carried by the nozzle for actuating the gripping means to securely grip the sides of the steel and maintain a fluid tight relationship between the nozzle and steel.

10. A blowing device for hollow drill steels having a smooth shank end, comprising an eXteriorly threaded nozzle having a fluid passage adapted to be aligned with the axial bore of a hollow drill steel, aplurality of yoke shaped pivoted jaw members adapted to grip the opposite sides of the smooth shank end of a drill steel, longitudinally movable links pivoted at one end to one end of said jaw members, an internally threaded nut on said nozzle to which the opposite ends of said links are connected, whereby movement of said nut in one direction actuates said jaw members to grip the sides of a steel, and a sealing packing around the fiuid passage between said nozzle and steel.

' In testimony whereof I have signed this specification.

LEWIS C. BAYLES. 

